DA: MIT Police officer Sean Collier killed by Boston Marathon bombers

Police say MIT officer shot in 'cold blood'

Officials have identified Sean Collier, 26, of Somerville, as the MIT officer shot and killed in last night’s shooting.

SOURCE: Middlesex County DA

DA: MIT Police officer Sean Collier killed by Boston Marathon bombers

Police say MIT officer shot in 'cold blood'

Updated: 12:09 PM EDT Apr 19, 2013

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CAMBRIDGE, Mass. —

Sean Collier had only worked at the Massachusetts Institute of Technology for about a year. But he was already popular with his colleagues in the campus police department, as well as with students, often joining them on hiking and skiing trips.

Authorities say the 26-year-old Collier was shot and killed by the Boston Marathon bombing suspects.

"We are heartbroken by the loss of our wonderful and caring son and brother, Sean," his family said in a statement. "Our only solace is that Sean died bravely doing what he committed his life to – serving and protecting others."